Flyoz
I assume you are talking about my wing incidence increase and that we are talking about the same thing
No adjustments were made to waterlines, other than extending them with wood strips. The point of change here is the relationship between the attachment of the main spar to the aft fuselage, specifically within that 6x6x24 inch area where the spar is floxed to the fuselage sides. Again it has nothing to do with the shape of the wing airfoils.
Specifically on the center spar/wing installation to the fuselage - after following the plans to this point - The spar/wing assembly is inserted in the fuselage with the wings fully attached to the main spar, i.e. with the VariEze attach bolts tightened. Everything related to the wing and spar are per plans at this point. The exception would be my level no-anhedral wings, unrelated to this canard/wing incidence discussion.
The main spar may or may not have some wiggle room in the fuselage. The wooden wing template is set on top of the wing per plans to set the incidence. The wooden template is now modified, for example with a spacer, to establish a one degree higher AOA for the wing. I enjoyed pulling out my old textbooks here and conferring with patient advisors.
Here is where I waterleveled the wings for accuracy between them and the fuselage. If the canard is already hard-mounted it should also be installed fully for confirmation of the wing relationship.
This template spacer and slight main spar tilt is the only adjustment or modification involved in raising the main wing incidence. On mine the wing angle was almost right already. I used a few swipes with some coarse sandpaper inside the fuselage openings to provide room for the spar tilt.
Now the spar is floxed in place.
The canard is also unchanged, just installed slightly nose up using a modified canard template on top, retaining the plans relationship with the wings.
A few extraneous thoughts. You are in extremely critical territory here, not the wing incidence thing, but building and flying your own airplane
Everything about interpreting the plans and CPs should be a group discussion and plenty of productive mental wrestling matches.
For our discussion here with the wing incidence you are installing the wing the same plans way. It is possible that other VariEze spars have been installed very nearly at the same incidence as mine, only mine was done this way on purpose
In fact, with the fairly crude method of installing the attach fittings to the wings, any two or three main spars can have slightly different "tilts" to them between the wings, up and down, fore and aft. That's why the fence and string setup when leveling the wings for the attachment (insertion) of the raw main spar between them is so useful. Wings and the spar are a matched set. A different wing may not match unless you are just extremely lucky.
My wings are pretty well matched to each other. In fact they are very well matched based on flight characteristics. But while the wings are level and matched at the roots and tips, the spar is not "level". While both wings are “To Plans”, one wing attach assembly is about 1/8th inch higher than the other. This is totally normal, almost undetectable, insignificant and appropriate.
I have looked at numerous ezes that fly well, that from the front and rear critical examination show that the wings and canard are not “perfectly” aligned. It’s wonderful that they are flying well.
I will finally agree with many honest others as to having made as many mistakes on one side as the other
While my plane could be cited as an example of rampant modifications, I feel the opposite, that the plane has followed the plans predominantly, and more significantly the intent of the Eze movement overall. The Ezes have been and are being honed by time. I know of no other airframe that allows so much of what Charles Lindberg spoke of,
“Science, freedom, beauty, adventure: what more could you ask of life?”We can all add our own passions to the list.
In agreement with Wayne’s prior comments on perfection, and the lack of it, I have been working on a note about the significance of the “Margin of Error” that seems to be the element of flying that we can actually influence or affect; practices like personal discipline, training, checklists, check flights, newsletters, etc that have evolved over the years. My efforts on capturing this in type have not matured adequately so far, particularly related to luck versus skill versus intelligence, but the significance of that margin is ever with me.
I hope working through this progression is helpful -- and a little unsettling, in the best possible way of course
Lindberg's full comments containing the quote can be Googled.